Marking gauge



erati I 1f Claim; Mai-inv n onl la l -mar ng 9 1 ,gauges andgwhile not limited to such use, is par: lt icularly designed-as metal marking tool, or ,line; gauge for marking 1 or scribing various, exact measurements on metal's, metalsheets orother'sv material for-marking or lining the edges of sheets ,for cutting, bending or other purposese'by tinners, achinistsor workers in other fields or with var ious materials, H

, Anotherobject of- Tthe invention isltoi provide-a:

"a simplephani'dy, efiicient and accurate marking ,tool orr gaug ewhich can bejconveniently used Q and which will give ex (act markingsfor,grneasurements inany desired-jstandard of.'measurement such as one-eighth inch, toione inch orfotherwisar so 'thatj the metal sheetl'or .material may be marlged from thefedg'e's forperforrning any opon in connection therewith, such" asin cut 't1ng,":bending, notching fforming or otherwise.

" j Anotherobjec't of theinvention isto'fprovide a simple andecononiical marking tool or gauge .whi chis preferably, though not necessarily, made .from' asheet of hardened 'spri'ngsteel or' the like to produce sharp marinate-raping 0r -.C 1ltting edges or corners fdr1prod'ucingascratching'mark up n et Q 2 q hcnm 't i and wh chobviat'es the necessity of employing a separate marking -toohor penicilf' I, r Other "objects and advantages will appear and be brought out more. fullyin the following speeii- I fication, reference beingv had to the accompanying drawing, in which? Fig. 1 s a perspectiveflview of a 'rnarkinfg tool" and showing the same in use;

. Fig. 2 is a face view thereof and showing, in faddition, aslight modification; and I Fig.3 is'an edgeview of the tool or gauge)" Referring to the drawings'more particularly,

or gaugemade inaccordanceywith the invention "it will be seen that the device comprises aflat plate H3 which may beof any suitable material ,but is preferably of hardened spring steel which may'beof H3 or other gauge and chrome plated "or otherwise treated torender the sameimpervious to rust-orcorrosion. While preferably of hardenedsteel or other suitable'metal so as to bite or cutinto ordinary sheet metal, such as "galvanized iron, tin or the like, it maybe used in connection with othermetals; suchas steel copiper or other materials such as wood, Bakelite or other plastic. material and consists generally of a plate ofregular orifregulanformwith 3,8111?- rounding convexedge relatively circular butisubstantually elliptical.- or Eovalz with a dove-tailed .extension' at onejend and with a plurality of acute UNITED? 3STA'TES PATENT OFFICE a r 2,328,678 Y r 1 r imagine GAUGE Edwin John Ross Chicagoflll. J I tan ents May 12, 194i, SeriaI No, 393,011 1,

angled notches or c utouts on its edge around'the margin, periphery or boundary thereof, which notches of acute angled formation are substantially of sixty degrees, more or less, and include "triangular cutouts having one edge forming a base and another edge forming a hypothenuse of a rightangledtriangle erected on the base,

thefree ends of which, if'conriec'ted, produce a r triangle. The acute angle formation of 'the notch is such thatwhen the gauge is placed with its base edge at an intersecting angle either at an acute angle as shown-or,perpendicular or normal to the surface to be marked as seen in Fig. "1 and the edge; forming the hypothenuse pending it, and forthe latter purpose may have --a: relative1y. central or otherwise arranged, hole -I,l sh'owncircular for suspending the same from ii/,hOOkflOl nail through the body of the plate. -As;.shown,v the plate which as before stated, is ,zrelativelycircular but substantially oval or e1;-

rlipticallin plan, is-provided with an extension 12 v ,atjone, end, namely, the tapered or small end or at its peripheral edge which may be said to :forma handle, this extension being preferably of dove tailor, fanxtail'shape as shown with a tapered end 13 or two edges at obtuse angles I relative to each other and merging in a point. :At'one side of the extension l2 which is primarily for larger measurements and markings is,an acuteanglednotch l4 preferably of 60 degrees,

moreror gless, andhaving an edge portion i5 at one side of'the extension l2 forming the hypothenuselof agtriangle produced by the notch in connection with the baseedge l6 disposed at acute angles relative to the edge it so that the notch or' cut out will form a triangle by a line connecting the outerends of the respective edges .15 and 15. This pr oduces a marking point or sharp corner I] at the meeting point or juncture of one edge portion l3 and the edge Hi so that a stripor sheet of material placed perpendicular to the base edge l6 and in contact with the point =1"; at one surface will give an exact measurement fromthe baseto said ,pqint which, in the, formshown, is three-quarters of an inch but which may be any desired measurement and in accordance withany desired linear scale, This also produces a right angle triangle between said surface or sheet, the edge l and the inner portion of the edge [6 with the material or sheet to be marked normal to theplane of the plate I0 corresponding to the extension or tapered projection l2 particularly as defined by one edge l3 and the edge atone sideinsofar-asfit is operative in connection with the notch l4, edges 15 and It and marking point [7. It also forms a taperedextension, projection or tooth l8 along the base It and with an adjacent acute angled notch 19 having a long edge 20 corresponding to the long edge l5 and forming thehypothenuse I of an adjacent triangular or V-shaped notch.

.The base edge is indicated at Hand the resultl tiing marking point orcorne'r 22 at the meeting point of the edges l6 and 20 if used in the manner previously described, will give a measurement, ,marking or line- ,i ve-eighths of an inch from;the edge of the sheet or. material to be marked when the; tool'or gauge is moved along one edgethereof :under: slight pressure as. indieatedin Fig 1 of the-drawing. 7 In a similar manner, a plurality of successive v .andspacednotches of varying sizes and measurements according to any standard scale, such as inches,.or of the metric system in centimeters,

notch 24 having the edge '25 producing the hypothenuse andthe edge 26 producing the base which in. this instance, is longer thanthe hypothenuse and an intervenin'g'marking. corner or .point 21 at the meeting point'of the edges 2 and 25. This gives a linear measurement. of one-half of an inch as marked onthe-gauge, but without again'repeatingit, it' is to;be under stood that any other suitable sizeofinotchfland consequently themeasurem'entto be. marked off, maybe provided in any standard or desired scale. The next projection isindi'cated at 28 and-like the projection or extension lZ, is of obtuse'angled formation with an intervening: edge 29-.between the edge 26 and a V-shaped or acute an- 'g le'd notch 30 to produce a shortedge-j3'l forming'the hypothenuse of the triangular notch with. {a lo'n'g'base edge 32' and resulting inamarking point or corner- 33; of acute angled formation at the meeting point of the edges-29 and 3l; As shown, this notch and marking point gives a measurement of three-eighths of 1 an inch when used in the manner illustrated and as previously described in connection with the notches. 4, =l.-9 and 2d. The base edge 32 formsone edg'esofa'n obtuse'angled projection 34 havingan intermediate edge 35 at obtuse angles 170'13118 edge: 32 andanother acute angled notch 36 'forms. an acute angled projection in connection withthe edge 35 having a short edge 31 forming the hypothenuse of the triangular recess or notch 36 with a long edge 38 forming the base and resulting at the meeting point of the edges'35- and -31 in a marking point orcorner -39' for giving a marking of five-sixteenthsof an inch as shown. The edge 38 form one side or edge of an obtuse angled projectionti) with an intermediate edge portion 4| at obtuse angles relative tovthe' edge 38 and forming with a V-shaped notch or'recess 42 a short edge 43 at acute angles'to theedge 41- and-forming the hypothe'nuse of a triangular recess including an edge portion 44 at acute angles to the edge 43 and resulting in a marking point or corner 45 with the edges 4| [and 43 at acute angle; to each other and designed for giv- 5 ing a measurement ofone-quarter of an inch or otherwise. The base edge 44. forms one side of an obtuse angled projection 46 with an edge POr- 5 tion 41 in such relation to the edge 44 and producing with an acute anglednotch 48, a short 10' edge 49 inf-similar relation 'tonan edge portion -.50 forming the vother edge of the recess and producing a base while the edge portion 49 produces the hypothenuse of a right angled triangle .erected on the base or edge portion 50 of the l5 triangular notch, cut out or recess. This results in amarking point 5| at the meeting point of the edgesATand 49 for giving a marking or The edge 50 forms one side of an obtuse angled 20 projection or extension 52 with an edge portion 53 in similar-relation to theedge 50 and "form.- ing' in connection" with the next adjacent acute angle-notch 54a short hypothenuse edgeiiop} x-posed'byfalong 'baseEed'ge 56' and resulting in fiemarnng point corner or edge 5-l-for giving"a measurement orfmarking" of one-eighth of'an inch.- The edge forms part of an obtuse an; gledprojection 5'8 with a V-sha-ped'or acute -'an gled notch. 59 having an edge portion or base 60 3 'forming theother side of the projection 58t'and producing. the hypothenuse fil of a right angled triangle erectedfonjthe b QS BfOf edge-6110f a triangula recess havingia. short side or base edge v tlifopp'osed by the long edgeor hypothenuse 61 iforming' the'other side of the extension. or pro- "jfction i2'and resulting'in a marking corner "or "edge- 62 which, in this instance," gives ameasur e- I merit of oneinch' from said cornerj62i to the base 60' by a surface orl ine normal to said base or the la'rge t'shownl in the particular gauge as illustrated. 20f, course,jthe" measurements may vary and the-device may; be made in'othersize's which inone forrn, as illustrated, is preferably one-quarterinchesso as'to, be relatively small and easily handled; placed in apocket or stored Iwh'en not'in use. In each instance, the measurement is takeniinerightfangles to thebase edge portion; that is, with the plane or the surface to t be markedn'ot only normalto the plate of'the gauge but at right anglesJtoithe length orplane or thebase edge to. th markmg'; corner or edge across the notch or; recess to form a substantially right angle trianglewith the inner portion of the notch. g In Fig. 2 of the .drawingglhave shown a slight modification in themarking of the gaugefin which. the plate Ill bears an irregular outline 63 withpointers or arrows adjacent each notch a d: pointing toward the vfsa me'with' the corresponding measurements for the particular notches adjacent thereto and within whichsaid outline pointers and markings-are provided. Jn either-form, the device is used by taking thework produced by thesheet ,or material. 65 having the surface to be marked so that, the edge ,66 thereof lfromzwmch, the measurementis taken is dis placed against arbaseedgesuch as. the base edge as indicated in Fig; 1 of the drawing and withthe surface or: workvextending perpendicular to the length-on plane of saidcedgelwhereby the marking zzcorne'r or point such. as: will. engage Jthe surface 65 .and' may bembxzedlOng the some by'fgrippingthe' plate of the gauge as seen intfil. I

measurement of--threesixteenths of an inch;

I 45 I abo'ut four andlthreeequarter inches by three and 1 to give the marking at a plurality'of points or as a line 61 also as indicatedin said View by cutting, scratching or digging into the metal or material of the work resulting in a mark, scratch or out which is readily discernible and accurate. Hardened spring steel is preferably used in connection with the metal marking but as previously stated, the gauge or plate thereof may be of any other suitable material according to the use prescribed. From the foregoing, it is thought that the manner of use, operation and advantages of the devicewill be readily apparentespecially to those skilled in the art and therefore further detailed description thereof is omitted. However, While it is optional, the outline E3 and measuring indicationseither or both, may and preferably are of contrasting form or'colors with respect to the gauge plate, and each other as W'ellif desired, so as to be more easily seen or discerned, though they may be impressed, stamped, em-

bossed, imprinted orotherwise formed or placed thereon, asit is thought will be readilyunderstood. Also, anysuitable marking means may be employed at the marking edges, corners or points to place a contrasting mark such as a line, dot, dash or otherwise on the sheet or surface, 65 properly supported to receive the gauge therescribed. Theplate may also be said to be relatively circular, ovalor egg shaped and tapered toward one end, and regular or irregular as desired. V

While I have illustrated and described the preferred form of construction for carrying my invention into efiect, this is capable of variation A and modification Without departing from the spirit ofthe invention. I, therefore, do not wish to be limited to the precise details of construction set forth, hut desire to avail myself of such variations and modifications as come within the i from the end of said side on a line perpendicular to the other side and forming a right angled tnangle h said sides; a V

EDWIN JOHN R008.

against at one or more edges as shown and de- 

